178 ZOOPHYTES. 



Fastigiate ; pale fuscous, disk usually nearly circular, gold-yellow, 

 centre smooth, margin tumid papillose, papillae bursiform, scarcely 

 a line high, tentacles small. Corallum erect, fastigiate; calicles 

 unequal, 1 to 1| inches broad, subturbinate, often compressed and 

 angular; lamellae strongly dentate; margin of calicle not re volute, 

 subacute. 



Red Sea. Forskal, Ehrenberg. 



The above description is from Ehrenberg, who collected specimens 

 in the Red Sea. He remarks that the calicles are less spinulous than 

 in the angulosa, and longer. 



Madreporacorymbosa,corymbiramisapice Caryophyttia corymbosa, Lamarck, 2d ed. 

 crassioribus, striato-aculeatis, slellis ter- ii. 356, No. 13 b. 



minalibus, sditariis, repando-lobatis, , Ehrenb., op. cit., G. Iviii. sp. 2. 



Forskal, Desc. Anim. Egyp., p. 137. Lobophyllia corymbosa, Blainv. Man. 356. 



5. MUSSA CACTUS. (Dana.) 



M. bene hemispherica ; discis virentibus, scepius suborbiculatis ; tenta- 

 culis interms bursiformibus, albis, et apice brunneis, externis paulum 

 elongatis et brunneis. Corallum ramis crebris, caliculis suborbiculatis 

 interdum ^-3-lobatis, 1-1J" crassis, subturbinatis, extus irregulariter 

 lamello-striatis et serratis ; lamellis in&qualibus, valde dentatis, apice 

 rotundatis, cum 3-5 dentibus subtriangulatis, 



Regularly hemispherical; disk usually suborbiculate, green; inner 

 tentacles bursiform, pearl-white and brown at tip, outer a little 

 elongate and brown. Corallum having the branches crowded, 

 calicles sometimes 2 to 3-lobed, 1 to 1J inches thick, subturbinate, 

 exterior irregularly lamello-striate and serrate; lamellae unequal, 

 strongly dentate, rounded at apex, with 3 to 5 subtriangular teeth. 



Plate 7, fig. 1, hemispherical clump natural size, with part of the 

 polyps expanded ; 1 a, tentacle enlarged ; 1 b, vertical section of a 

 calicle ; 1 c, transverse section. 



Feejee Islands. Exp. Exp. 



This species differs from the angulosa in having the lamellae thicker 



